I pull the youngens around in a wagon behind any Wheel Horse I own!
I know that isn't the answer you were looking for, but I am not a "garden tractor puller" participant, although I do get a kick out of watching them!
I also have watched (and enjoyed) garden tractor demolition derby....but most were NOT good GT's to begin with!

@ebinmaine I took a 42" plow and added 6" to each side, making a 54" plow and I used it with my GT-14 with inside the wheel wheel weights.
I could also use this with my 520 H, but currently have a 48" on it and am ready for possible snow overnight!